So you're looking for an equivalent to "offset" in AutoCAD?
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dassoukiAug 15 '10 at 23:06

@dassouki: Sorry, I don't know AutoCAD. But I think UMN Mapserver has an "offset" option that would do what I'm looking for.
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underdark♦Aug 17 '10 at 10:11

How to create one-sided buffers or parallel lines, from a table that have 600 lines?
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user3230Jun 10 '11 at 0:35

Welcome to the site. If the current set of answers doesn't solve your problem you should open this as a new question (and state why this question does not answer your problem). Within the format of the site this is not an appropriate place to make this statement, as it is not an answer to the question.
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Andy WJun 10 '11 at 1:26

How can I create a parallel lines in a MULTILINESTRING table?
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Felipe CostaJun 23 '11 at 13:35

4 Answers
4

Proper one-sided buffers were supposed to have landed in 1.5, but it looks to me that while the styles did land, sidedness didn't make it in. There is however a current patchset which exposes GEOSSingleSidedBuffer and performs the one-sided buffer as expected, under the name ST_OffsetCurve; see further background in ticket #413. In use: